% \iffalse meta-comment
%
% This is part of the barcode package.
% You should run 
%     tex barcodes.ins
% instead of reading/running this file.
% Among other things, you will then get a documentation.
% I guess you need some, or you wouldn't look here.
% \fi
%
%% \CharacterTable
%%  {Upper-case    \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
%%   Lower-case    \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
%%   Digits        \0\1\2\3\4\5\6\7\8\9
%%   Exclamation   \!     Double quote  \"     Hash (number) \#
%%   Dollar        \$     Percent       \%     Ampersand     \&
%%   Acute accent  \'     Left paren    \(     Right paren   \)
%%   Asterisk      \*     Plus          \+     Comma         \,
%%   Minus         \-     Point         \.     Solidus       \/
%%   Colon         \:     Semicolon     \;     Less than     \<
%%   Equals        \=     Greater than  \>     Question mark \?
%%   Commercial at \@     Left bracket  \[     Backslash     \\
%%   Right bracket \]     Circumflex    \^     Underscore    \_
%%   Grave accent  \`     Left brace    \{     Vertical bar  \|
%%   Right brace   \}     Tilde         \~}
%%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% % EAN documentation starts here                %%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%<*eandoc>
\documentclass{article}
\begin{document}
\author{Peter Willadt}
\title{EAN Barcodes by \TeX{} an Metafont}
\date{1998-01-24}
\maketitle
\begin{abstract}
This article documents the use of the font {\tt wlean.mf}. With the font,
there also comes an auxiliary Perl file for preprocessing TeX source. 
Its use is also documented here.
\end{abstract}

\section{Legal Restrictions and Introduction}

All the files in this package are subject to the \LaTeX\ Project Public
License. Also I got a special wish: If you find this package useful,
support TUG or your local \TeX\ user group.

The complete contents of this package is
described in the file {\tt README}. That file also contains some
information about the use of the other barcode fonts that are
contained. For more information about these other files you may want
to read an article that has appeared in the december, 1997 issue of
{\em TUGboat}. Please see also the remarks in the section {\em
Address} later in this file. 

\section{About {\sc ean}}

In stores, {\sc upc} and {\sc ean} codes are widely used for automatic
identification, pricing etc. {\sc ean} consist of either eight or
thirteen digits. Twelve digit {\sc upc} codes are like thirteen digit
{\sc ean} with the first digit equal to zero. {\sc ean} specifications
do not only
require bars, also the encoded number has to be written in plain text,
in case a reader is defective or the code is too hard to read. {\sc
ean} is a high-density code, and so it is highly vulnerable.

\subsection{Coding} 

The last digit of an {\sc ean} is a weighted mod 10 checksum. Digits
are alternatingly multiplied by 1 or 3. The so calculated sum over all
digits has to be divisible by ten without any remainder.

There are three different {\sc ean} character sets labeled A, B, and
C. Eight digit {\sc ean} codes use character sets A and C, {\sc ean}
codes with thirteen digits use all three character sets---see below.

\begin{verse}
{\sc ean} with eight digits consists of:\\
a sidebar\\
the first four digits (coded in character set A),\\
the middle separator,\\
the other four digits (coded in character set C)\\
another sidebar.
\end{verse}

The first half of an {\sc ean} code with thirteen digits is coded in
the character sets A and B, the second half in character set C. The
coding of the very first digit is hidden in the varying use of the
character sets A and B. A C programmer might use the following table
and algorithm to decide which character set to use for digits 2--7:

\begin{verbatim}
static UBYTE abtab[10][6]={
  {0,0,0,0,0,0}, /* 0 */
  {0,0,1,0,1,1}, /* 1 */
  {0,0,1,1,0,1}, /* 2 */
  {0,0,1,1,1,0}, /* 3 */
  {0,1,0,0,1,1}, /* 4 */
  {0,1,1,0,0,1}, /* 5 */
  {0,1,1,1,0,0}, /* 6 */
  {0,1,0,1,0,1}, /* 7 */
  {0,1,0,1,1,0}, /* 8 */
  {0,1,1,0,1,0}  /* 9 */
};

char eancode[18];
char eansource[14]="4025700001030";

eancode[0]=eansource[0];
eancode[1]=' ';
eancode[2]='+';
for(i=1;i<7;i++)
  eancode[i+2]='A'+eansource[i]-'0'
               +abtab[eansource[0]-'0'][i-1]*('a'-'A');
/* then the middle separator, digits 7--13,
 * and the final + sign */
\end{verbatim}


A zero means to use character set A and a one means to use character
set B for the respective digit. The printed code of an {\sc ean} 13
consist of the following elements, from left to right:

\begin{verse}
The first digit in human-readable form\\
an {\sc ean} sidebar\\
six digits in character sets A or B\\
the {\sc ean} middle separator\\
six digits in character set C\\
another {\sc ean} sidebar
\end{verse}

Magazines or codes with pricing have a so called extension following
the main code with some fixed distance. This extension consists of one
sidebar and two or five digits. As I have no full {\sc ean}
documentation at hand at the time of this writing, I am sorry that I
am not able to tell you more about this.

The {\sc ean} digits themselves obey to the following rules: Each
digit takes seven units of space. Some of the seven elements are
white, others are black. Digits from character set A always are white
at the left edge and black at the right, and they always have an odd numer
of black elements. Digits from character set B are quit similiar, but
they have an even number of black elements. Digits from Character set C
always start with a black element and have an even number of
black elements. The rightmost element in character set C is always white.
The sidebars are three elements wide, the middle separator takes five
elements. 

\subsection{What {\sc ean} numbers may I use?}

For inhouse use, you may use any 13-digit {\sc ean} that starts with a
2. If you want to have your products sold elsewhere, you have to buy a
set of {\sc ean} numbers from the organisation in your country that
holds these numbers. For germany, this organisation is the {\em
Zentrale f\"ur Coorganisation} in Cologne. Almost any country has a
similiar organisation. 

The first digit or sometimes the first two digits code the country of
origin, the next five to six digits code the manufacturer, the eigth
to twelfth digits are for free use by the manufacturer. The
thirteenth digit is, as explained above, a checksum. {\sc ean} do not
contain any qualifiers, so if you get an {\sc ean} from somewhere, you
may find out about the country of origin and about the manufacturer of
the product, but if you want to know more, you have to contact the
manufacturer. 

\section{Using {\tt wlean.mf}}

{\tt wlean.mf} is rather raw. It  contains all three {\sc ean}
character sets within one single font, but at different places.
The character sets A, B, C, and the digits are
featured through the following characters:

\begin{verse}
0 to 9 yield the digits from 0 to 9\\
A to J yield the codes from character set A\\
a to j yield the codes from character set B\\
K to T yield the codes from character set C\\
+ makes the left and right sidebar and\\
- makes the middle sign
\end{verse}

So, to code the number {\tt 2099993098253}, you have to write\\
\verb*|{\eanfont2 +AJjjJd-KTSMPN+}|. The space is necessary to separate
the leading 2 from the barcode.

{\tt wlean.mf} does not use true {\sc ocr} digits, as it should. As
the digits will not be used for {\sc ocr}, I do not consider this as
a serious restriction. If you really need {\sc ocr} digits, there is
an {\sc ocr} font on {\sc ctan}. And in {\em TUGboat}, there has been
a publication about {\sc ean}, where \TeX{} draws the bars and
the {\sc ocr} font prints the digits, see [1]. 

{\tt wlean.mf} uses the normal {\sc ean} dimensions. If you would like
lower bars---in contradiction to the {\sc ean} rules---you have to edit
the source. The rules also make recommendations about the scaling. To
be fully compatible, this font may be scaled 0.8, 0.9, 1, 1.2, 1.4,
1.5, 1.7, 1.85, or 2 times the original size. With a 300 dpi printer,
I do not recommend using sizes$<1.0$.

\subsection{Installation}

The installation itself is pretty mundane, like with any plain font.
Just copy {\tt wlean.mf} to a location where Metafont can find
it. Then invoke Metafont to create a {\sc tfm} file. Move this {\sc
tfm} file where \TeX{} can find it. Type in the example at the end of
this file and run it through \TeX{}. Then call Metafont again to
produce a font suitable for your printer or previewer and move this
font to an appropriate location. You may also want to edit {\tt
codean.pl} to run on your shell. For this purpose you have to read
your system's documentation or the documentation that comes with Perl.

\subsection{Making readable output}

Don't make {\sc ean} too small. With a 300 dpi printer, you should not
use this font with magnification$<1$; {\tt scaled 1200} will be okay.
If you want to do mass production, go to somebody with a barcode
reader and check your output, {\em before} you loose money. You also
should consider changes in the blackness that may be caused by
production printing devices. And, of course, you should only use
colours that can be used with barcode reading devices. Especially, do
not use red and watch for much contrast between the colour you print
and the colour of the paper.

\subsection{Coding the numbers}

You will perhaps not want to write something as ugly and error-prone
as \verb*|{\eanfont2 +AJjjJd-KTSMPN+}| manually. So you have to use a
preprocessor\footnote{See bcfaq.tex for \TeX{} code to go without
preprocessing. It is very fine.}. With {\tt wlean.mf} there comes a
tiny Perl program ({\tt codean.pl}) that does preprocessing within
your \TeX{} sources\footnote{codean.pl in the meantime also handles
code 128. See bcfaq.tex}.

The \TeX{} file to be filtered may contain any number of lines
that have one of the following commands starting at the leftmost position.

\begin{itemize}
\item \verb|\ean{|{\em12 or 13 digit number}\verb|}|
The number will be coded as {\sc ean}. If it is only 12 digits long, the
checksum will be calculated, too.

\item \verb|\embed{|{\em12 or 13 digit number}\verb|}|
The number is used as a base for embedding article numbers \&c.\
within an {\sc ean}.

\item \verb|\eean{|{\em number with at most 11 digits}\verb|}| 
This number is to be embedded within an {\sc ean}.

\item \verb|\isbn{|{\em valid ISBN}\verb|}| An {\sc isbn} to
make an embedded {\sc ean} of.
\end{itemize}

Let's look at an example: You want the {\sc isbn} {\tt0-201-13448-9}
to be embedded. So you write \verb|\isbn{0201134489}|, but you might
also use the embedding method and write
\verb|\embed{9780000000000}| and, somewhere later in the file,
\verb|\eean{020113448}|. In this latter case you have to omit the last digit,
as {\sc isbn} loose their check digit in favour of the {\sc ean} check digit.
Anyway you do it, you get your command replaced by
\verb|\EAN{|{\em13-digit-number-coded-strange}\verb|}| in the output
file.
 
But embedding is especially useful if you also write the program that
reads the barcodes. This program might then extract your article
number from an {\sc ean} starting with {\tt20}, eg.

What you have to do is, of course, to use stub definitions for the
three macros mentioned above---as they shall never actually be
typeset---and to use a valid definition for \verb|\EAN|. Then you run
your \TeX{} source through {\tt codean.pl}. This program takes as
first parameter the name of your original file and as second parameter
the name of your destination file. If you omit the parameters, you will
be asked for them.

You may of course also peek the source of {\tt codean.pl} to see how
{\sc ean} checksums are calculated, and so on.

\subsection{Example}

Here is a full example.
Use this \TeX{} source:

\begin{verbatim}
\font\eanfont=WLEAN
\def\ean#1{\message{Call codean.pl}}
\def\eean#1{\message{Call codean.pl}}
\def\isbn#1{\message{Call codean.pl}}
\def\embed#1{}
\def\EAN#1{\vbox{\vskip10pt\eanfont#1\vskip10pt}}
 Now, something to do:
\ean{4025700001030} % or, without checksum:
\ean{402570000103}
\embed{2500000000000}
\eean{123}
\isbn{0201134489}
\end{verbatim}



Having run your file through {\tt codean.pl}, the lines after the percent
sign look like this:

\begin{verbatim}
 Now, something to do:
\EAN{4 +AcFHaa-KKLKNK+} % or, without checksum: %(4025700001030)
\EAN{4 +AcFHaa-KKLKNK+} %(402570000103)
\embed{2500000000000}
\EAN{2 +FAaaAa-KKLMNT+} % embedded(123)
\EAN{9 +HiaCaB-LNOOSN+} % ISBN(0201134489)
\end{verbatim}


Running this file through \TeX{}, you get {\sc dvi} output containig
{\sc ean} barcodes. Perhaps you wonder why there is not even a
single {\sc ean} contained within this documentation. The reason is
quite simple: You should be able to read the docs {\em before} you
have installed the font. But now is the right time to try the example
on your own. Better yet, you may code an {\sc ean} where you have
taken the number from something like your favourite candy and then,
having printed it, you may compare the bars. This is a nice way to
spend your evenings. I actually started deciphering {\sc ean} codes in
this way, several years ago.

\section{The End}

\subsection{Address}

Just in case you want to write to me, here is my address---but
please note: I am not the {\sc ean} guru. 

\begin{verbatim}
Peter Willadt
Heinrich-Wieland-Allee 5
75177 Pforzheim
Germany
email: Willadt@t-online.de
\end{verbatim}

I also would appreciate if only one version of the material contained
in this package is distributed. So if you have any corrections,
suggestions, \&c., please do not hesitate to send them to me to
incorporate them within this package.

\subsection{Acknowledgement}

I want to express my special thanks to Barbara Beeton for proofreading
and making valuable suggestions. If there are still any typos or
illegibilities, that is due to the fact that I had to change some
things later on.

\begin{thebibliography}{1}

\bibitem{bc:ean}
Peter Ol{\v{s}}ak.
\newblock The {\sc ean} barcodes by {\TeX}.
\newblock {\em TUGboat}, 15(4):459--464, 1994.

\end{thebibliography}

\end{document}
%</eandoc>
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% % EAN documentation ends here                  %%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% % general documentation starts here            %%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%<*bcfaq>
% this file contains answers to frequently asked questions (FAQ)
% about barcodes and---to some extent---VPL files.
\documentclass[a4paper]{article}
\bibliographystyle{alpha}

% macros for the examples
% These are documented within the text.

% Barcode fonts
\font\itf=wlitf scaled 1200

% barcodes with depth
\def\bcbox#1{\lower3pt\hbox{\itf +#1-}}

% barcodes made taller
\newbox\bsavebox
\newdimen\bcboxdepth
\bcboxdepth=4pt
\def\bdbox#1{\setbox\bsavebox\hbox{\itf +#1-}
\vbox{\hsize=\wd\bsavebox\offinterlineskip%
	\copy\bsavebox%
	\vskip-\ht\bsavebox\vskip\bcboxdepth%
	\box\bsavebox\vskip-\bcboxdepth}}
\def\bebox#1{\setbox\bsavebox\hbox{\itf +#1-}
\vbox{\hsize=\wd\bsavebox\offinterlineskip%
	\copy\bsavebox%
	\copy\bsavebox%
	\vskip-\ht\bsavebox\vskip\bcboxdepth%
	\box\bsavebox\vskip-\bcboxdepth}}

\def\tbs{{\tt\char92}}
% makes a typewriter backslash
\begin{document}
\title{Barcodes-FAQ}
\author{Peter Willadt}
\date{1997-11-09}
\maketitle
\begin{abstract}

This file deals with questions about barcode fonts created for
\TeX{}. Its purpose is not to replace the regular documents, but to add
informations that may be of no interest for the casual reader.

\end{abstract}

\section{Changelog}

\subsection{Changes of the barcode package in general}
\begin{tabular}{ll}
\em Date & \em Change\\
1999-05-29 & added license note to README\\
1999-05-29 & added install.bat\\
1998-11-28 & included wlcr39, wlcf39, and wlc93\\
1998-04-21 & fixed wlitf bug\\
1998-04-10 & switched partially to docstrip archive\\
	   & added support for code 11\\
1998-01-24 & added code 128 in MF format, changed codean.pl\\
1997-11-08 & changed metrics of {\sc itf} start/stop chars\\
1997-10-09 & released first version of the barcode package
\end{tabular}

\subsection{Changes within this document}

\begin{tabular}{ll}
\em Date & \em Change\\
1999-05-29 & added short info about install.bat\\
1998-11-28 & added docs about code 93\\
1998-04-10 & added docs about code 11\\
1998-01-24 & added information about code 128\\
1997-12-08 & added contributions to {\sc ean} coding by Kalvis M. Jansons\\
	 & changed section on plessey\\
1997-11-09 & added several items, rearranged sections\\
1997-11-08 & started writing first version
\end{tabular}

\section{Introduction}

The barcode package itself can be found on {\tt ctan} in the
subdirectory\\ {\tt fonts/barcodes/willadt}. It contains---among
others---several fonts in {\sc vpl} format, so your {\sc dvi} driver
should be able to handle virtual fonts. If it doesn't, you may perhaps
use {\em dvicopy} to resolve the references to virtual fonts, or you
may perhaps upgrade to a more modern \TeX{} package.

\section{What about docs?}

\subsection{Docs about barcodes}

With the barcode package, there comes documentation about {\sc ean}
fonts. In the README file, there are short examples of the use of
the other fonts, too. Also the files {\tt examples.tex} shows the look
and basic usage of the barcodes.

In {\sl TUGboat}, barcoding has been covered in several
articles \cite{bc:ean,bc:sauter,bc:vulis}. The barcode package itself
is covered in an article that has appeared in the december issue,
1997, of {\sl TUGboat}.

\subsection{Some information about code 128}

Code 128 is able to print all 128 ascii chars. There are a little more
than a hundred glyphs that are interpreted in three different
ways. Some of the glyphs are used as shift chars to determine which
interpretation to use. A checksum is mandatory. To use it, you must
install {\tt wlc128.mf}.

The preprocessing---switching among the different character sets,
coding efficiently, calculating the checksum---is handled by the
newer versions of codean.pl. This is perhaps not as pleasing as to do
it with \TeX{} alone, but, alas, it works.

The way to run the preprocessor is described in {\tt eandoc.tex}. To
use code 128, you have to write a line starting with {\tt\tbs cxxviii\{}
followed by the characters you want to code and followed by a closing
brace. Non-printing seven-bit ascii characters may be specified in hex
in C or \TeX{} style, like {\tt\tbs x3f} or \verb|^^3f|. Anything up to
the rightmost closing brace in this line will be coded---there is no
brace matching. But you will get a warning message if your text
includes a right brace. So you may want to code braces in hex form to
avoid this message. Please note that {\tt codean.pl} does almost no
checking for errors, so if you intend to produce garbage, there are
lots of ways. If you need code 128 escape characters, they may be
included as hex characters with codes starting at 0x80.

\begin{tabular}{lllll}
\em Input Code & \em C128 number &\multicolumn{3}{c}{\em meaning}\\
\em(hex) & \em(dec.) & \em Set A & \em Set B & \em Set C\\
0x80 	& 96 	& FNC3	& FNC3	& 96\\
0x81	& 97	& FNC2	& FNC2	& 97\\
0x82	& 98	& SHIFT	& SHIFT	& 98\\
0x83	& 99	& CODE C& CODE C& 99\\
0x84	& 100	& CODE B& FNC4	& CODE B\\
0x85	& 101	& FNC4	& CODE A& CODE A\\
0x86	& 102	& FNC1	& FNC1	& FNC1\\
0x87	& 103	& START A& START A& START A\\
0x88	& 104	& START B& START B& START B\\
0x89	& 105	& START C& START C& START C\\
0x8a	& 106	& STOP	& STOP	& STOP
\end{tabular}

But please keep in mind that {\tt codean.pl} does almost anything for you,
you should not have the need to insert start/stop codes and the
like. Only if you use EAN128, you will need {\tt FNC1}. Just to make
it clear: For your barcode to include {\tt FNC1} you have to write
\verb|^^86| before preprocessing.

{\tt codean.pl} will insert a sequence of hex digits; the original
text will be appended to the line as a comment.
Also, your \TeX{} file has to define some macros. They look like
this:

\begin{verbatim}
\font\fntcxx=wlc128 scaled \magstep3
\def\CXXVIII{\bgroup\fntcxx\let\next\hexchar\next}
\def\cxxviii{\message{OOPS, use codean.pl}}
\def\hexchar#1#2{\if#1@
            \global\let\next\egroup
            \else\char"#1#2\fi\next}
\end{verbatim}

If you do not like end recursion, you might use other ones. If
you dislike the hex format produced by {\tt codean.pl}, you are free to
change it---as long as you don't redistribute.

\subsection{A little bit about code 11}

Code 11 is a numeric-only barcode. It is almost as space-efficient as
{\sc itf}, and it comes with a checksum. The checksum should be
swallowed by the reading device. The checksum is a weighted mod-11
checksum. There are apparently two kinds of checksum in use: such with
one checkdigit and such with two checkdigits.

To use code 11, you should include {\tt barcode.sty}. \TeX{} will
calculate the checksum on its own. If you need two check digits, you
should say\\
{\tt\tbs codexichecksumktrue}.\\
How many check digits you
actually need should be made clear in the documentation to your
reading device\footnote{You may also want to check the documentation
to find out if your reading device supports code 11 at all; code 11 is
not that common.}. You may code the digits 0--9, and the minus
sign. The start and stop sign is mapped to the @ character. Here is a
full example. {Please note: If you do not use \LaTeX{}, you may
have to supply a definition for {\tt\tbs makeatletter}
and {\tt\tbs makeatother}}:

\begin{verbatim}
\input barcodes.sty
%% with two check digits
\codexichecksumktrue
\codxi{12-1234}

%% with only one check digit.
\codexichecksumkfalse
\codxi{12-1234}
\bye
\end{verbatim}

\subsection{About code 93}

Code 93 is a little bit more compact than code 39 (as it uses also the
gap between the characters), but in other aspects it is quite
similiar. A checksum with two digits is mandatory. As with code 11,
checksumming works by weighing the characters different depending on
their position within the barcode. 

The version of code 93 that is included within the package resorts to
uppercase ascii, digits, and to some other signs. Start and stop sign
are mapped to {\tt<} and {\tt>}, respectively.

Full ascii works similiar to full ascii with code 39 (that means with
escape characters), but fortunately the escape characters are
different from ordinary characters, so that you can hardly be
misunderstood. Unfortunately the escape characters are named (\$),
(\%), (/), and (+), so I decided to map them to opening and closing
parentheses and brackets, respectively. This may not seem very clever
when it comes to full ascii, but these characters may also appear as
checksum characters, so we need them when doing uppercase ascii,
too. For full ascii, it would be clever to redo the font in a
completely different way and to map start sign, stop sign and the four
escape characters to positions above 128, so that any 7 bit ascii
character can be input directly.

Code 93 is supported by codean.pl in the same way as ean or code 128
are. You have to write {\tt\tbs xciii\{YOUR DATA 123\}}, run the file
through {\tt codean.pl}, then you'll get\\
{\tt\tbs XCIII\{YOUR DATA 123NN\}\%Code93(YOUR DATA 123)}

The NN make up the two check characters. Normally, they are different,
but in this example they are equal, by incident.

\subsection{Docs about VPL Files}

VPL files are documented in the files {\tt VPtoVF.WEB} and {\tt
VFtoVP.WEB}. Both files can be found on {\sc ctan} under {\tt
SYSTEMS/KNUTH}. {\em WEAVE} may be used to produce \TeX{} files. The
documentation about the VPL/VF file formats is covered within the
first few sections.

\section{I want other metrics etc.}

\subsection{My barcodes should have depth}

You have got several possibilities to obtain depth. The most simple
approach may be to set the barcodes with the regular barcode fonts into an
{\tt\tbs hbox} and then to {\tt\tbs lower} this hbox. 

Let's look at an example:

\begin{verbatim}
\font\itf=wlitf scaled 1200
\def\bcbox#1{\lower3pt\hbox{\itf +#1-}}
 Example:
{\sc itf} barcode looks like \quad\bcbox{1009}\quad
for 1009, e.g.
\end{verbatim}

This code yields the following result:

{\sc itf} barcode looks like \quad\bcbox{1009}\quad for 1009, e.g.

Another approach is to edit the font sources. In case of {\sc vpl}
files, this is quite painful. Rules in {\sc vpl} files do not have
depth, so you have to change the characters mapping in a way that you
add a {\em movedown} before you draw, and a {\em moveup} afterwards.
You may see the changes for an arbitrary character from {\tt
WLITF.VPL}:

\begin{verbatim}
(CHARACTER D48
   (COMMENT from WLITF.VPL}
   (CHARWD D 14)     (CHARHT R 10)
   (CHARDP R  0)     (CHARIC R  0.0)
   (MAP
      (SETRULE R 14 R 1)(MOVERIGHT R 1)
      (SETRULE R 14 R 1)(MOVERIGHT R 1)
      (SETRULE R 14 R 2)(MOVERIGHT R 2)
      (SETRULE R 14 R 2)(MOVERIGHT R 2)
      (SETRULE R 14 R 1)(MOVERIGHT R 1)
      )
   )
\end{verbatim}

This character may be lowered by four units by editing in a way that the
following lines result. Please note that there were not only the {\em
moveup} and {\em movedown} commands added, but also the height an
depth have been changed.

\begin{verbatim}
(CHARACTER D48
   (COMMENT Lowered to give some depth)
   (CHARWD D 14)     (CHARHT R 10)
   (CHARDP R  4)     (CHARIC R  0.0)
   (MAP
      (MOVEDOWN R 4)
      (SETRULE R 14 R 1)(MOVERIGHT R 1)
      (SETRULE R 14 R 1)(MOVERIGHT R 1)
      (SETRULE R 14 R 2)(MOVERIGHT R 2)
      (SETRULE R 14 R 2)(MOVERIGHT R 2)
      (SETRULE R 14 R 1)(MOVERIGHT R 1)
      (MOVEUP R 4)
      )
   )
\end{verbatim}

\subsection{My barcodes are too tall}

For the sake of the person who has to scan the barcodes, barcodes just
can't be tall enough. If the complete code is as tall as wide, the
reading device can be twisted against the code at an angle of 45
degrees. If they are half as high, the angle reduces to 26 degrees.

If you really want short codes, you have to edit the sources. In the
{\sc vpl} file, you have to change the {\em charht} and the first parameter
to the {\em setrule} command at well. You also should change the {\em
designsize} parameter.

\subsection{My barcodes are not tall enough}

You may also change the sources, like described in the previous
subsection. But there is another solution that is perhaps more
practical. The idea is simple that double black is still black and
that you may overlay several printouts of the same barcode. Here is
the example code (it may be made taller by adding more copies of the
barcode box, of course). There is an extra dimension {\em bcboxdepth}
added to yield depth for the barcodes.

\begin{verbatim}
\newbox\bsavebox
\newdimen\bcboxdepth
\bcboxdepth=4pt
\def\bdbox#1{\setbox\bsavebox\hbox{\itf +#1-}
\vbox{\hsize=\wd\bsavebox\copy\bsavebox%
	\vskip-\ht\bsavebox\vskip\bcboxdepth%
	\box\bsavebox\vskip-\bcboxdepth}}
\def\bebox#1{\setbox\bsavebox\hbox{\itf +#1-}
\vbox{\hsize=\wd\bsavebox\copy\bsavebox%
	\vskip0pt\copy\bsavebox%
	\vskip-\ht\bsavebox\vskip\bcboxdepth%
	\box\bsavebox\vskip-\bcboxdepth}}
 Example:
Tall {\sc itf} barcode looks like \quad\bdbox{1009}\quad
or (still taller) \quad\bebox{1009}\quad for 1009, e.g.
\end{verbatim}

And here is the result, you may compare it with the output of the
previous example:

Tall {\sc itf} barcode looks like \quad\bdbox{1009}\quad or (still
taller) \quad\bebox{1009}\quad for 1009, e.g.

\subsection{My barcodes are too wide/too narrow}

Perhaps you should change the barcode size (by changing
{\tt\tbs magnification}) and then read the subsections above about too
tall bars and bars that are not tall enough.

\subsection{My barcodes should run vertically}

Vertically oriented barcode is a good idea for cans, bottles and
similiar things.

It just depends on your {\sc dvi} driver. Perhaps there is a
possibility to handle rotation via {\tt\tbs special}, as with {\em
dvips} and the {\em rotate} macros. For experimantal purposes I have
included a code 39 version running down instead right ({\tt
wlcr39.mf}). You may perhaps use it with {\tt\tbs shortstack} or
similiar. Here is some code I used (successfully) with plain \TeX:

\begin{verbatim}
\font\testfont=wlcr39 scaled 1200
\def\bcbax{\let\next\bcbox\vbox\bgroup
    \offinterlineskip\testfont\setbox0\hbox{@}\hsize=\wd0
    \noindent{}@\hfil\break\next}
\def\fertig{@\hfil\break\egroup}
\def\bcbox#1{\if @#1\let\next\fertig\else#1\hfil\break\fi\next}

Look buddy, this is \bcbax1406632@ code 39 
stacked and running downwards. 
\end{verbatim}

\subsection{I heard something about full ascii code 39}

Well, umh, now that you ask\dots The truth is: You may perhaps be able to
configure your reading device to accept full ascii code~39. Then you may 
code any 7~bit character you may think of. The bad news is that most of 
the symbols have to be coded by two
characters -- and as code 39 has already low density, you should not
expect to get much use of it. Perhaps you might want to try code 128
instead---it features full 7-bit ascii without any compromise.

Another anti-feature is that switching to reading full-ascii code~39
may lead to some bad reads of `normal' code~39. In full ascii, the lower
case letters, e.g., are made by prepending the uppercase letters with a 
plus sign, so {\tt+A} is read as {\tt a}. So, if you have got regular
code~39 that contains such character sequences, and you have switched 
your reading device to full ascii, you may get bad results. 

But, now that you want it: With the barcode package there comes a font
{\tt wlcf39.vpl}. You may install it like the other vpl files. It has got
132 characters and has already taken all the coding for full ascii, so
when you typ {\tt e,\$4+A}, it will silently be mapped to what you
would have typed as {\tt+E/L/D/KA}, if you would use the plain code~39
format\footnote{Please take note: 6 characters are blown up to 9,
think again about using another code}. In my version of full ascii
code~39, the start/stop sign is mapped to @@ (or \verb|\char128|). So
you actually had to add @@ to the front and the end of the example
string. If you can not exclude that the character sequence @@ appears
within the text you want to code, you have to avoid ligature
processing. You may do that like this:

\begin{verbatim}
\font\fullas=wlcf39 scaled 1728
\def\alphanolig{\char64\kern0pt}
\def\printacode#1{{\fullas@@{\catcode`\@=\active%
	\let @=\alphanolig#1}@@}}
\end{verbatim}

You also have to escape or circumscribe special characters to make
them really printable, of course, so that when you wanted a backspace,
a tab, a space, a dollar sign, a percent sign, and a bell character to
be coded, you would type something like

\begin{verbatim}
{\fullas @@\char8\char9\char32\$\%\char7}
\end{verbatim}

\section{Troubleshooting}

\subsection{My barcodes can't be decoded}

At first, try to make them larger. If that does't help, make them
larger, again. If that will not help, obtain fonts in \TeX{} or
Metafont format and make them brighter. Or, perhaps better, obtain a
better printer.

You also should check the contrast between bars and background,
especially when using a dot matrix printer or coloured background
or---still worse---red bars.

\subsection{My decoder reads extra digits, sometimes}

I guess you use {\sc itf} barcode with a number of digits that is
sometimes even and sometimes odd. As {\sc itf} always codes two digits
at once, you should take care just to code an even number of digits at
any time. If an excess zero at the beginning of your number is not
acceptable, you might try another kind of barcode instead of {\sc
itf}. 

\subsection{Can't run pdf\TeX\ with EAN fonts}

I know about this problem, but I don't know what to do about it. 
Also pdf\TeX\ does terrible things about the {\tt vf} only fonts.
Even worse, viewed with acrobat they look totally different than
with GhostScript. So I recommend ignoring pdf till these troubles 
are gone. 

\section{Missing items}

\subsection{I am missing two-of-five}

I got specs for two-of-five (three bars). If you want it, let me know;
I might implement it. For other kinds of two-of-five, I haven't got
complete specs.

\subsection{I am missing plessey}

I got the specs but I haven't yet got the time to implement them. With
plessey, there also rise several questions due to the fact that
plessey has never been officialy standardized. The only thing that is
absolutely sure about plessey is how binary ones and zeros are
encoded. There are codes that are more wide-spread. Several modern
barcode readers can't cope with plessey code.

\subsection{I am missing \dots{} some other barcode}

I have checked out several two-dimensional barcodes. But for most of
them, support by \TeX{} seems to be rather pointless. Perhaps Metafont
could be called any time you have to code something to draw the
symbols, but you might as well use a custom drawing program that comes
from the barcode vendor. Also, most two-dimensional barcodes (and
other barcodes not mentioned here) are proprietary. Last not least the
reading devices I have access to can deal only with a finite range of
barcodes.

I am sorry, but I haven't got the specs for further barcodes
not mentioned here. If you could be so kind as to send them to me, I
might perhaps implement them.

\section{Contributions}

\subsection{EAN without preprocessing}

The following code is due to Kalvis M. Jansons.

It handles printing of {\sc ean} without having to run a
preprocessor. Not only are the {\sc ean} bars drawn, also the checksum
checksum is checked. It can be easily
adapted to non-\LaTeX{} use by omitting anything before \verb|\font|

\begin{verse}
Kalvis M. Jansons

eMail: \verb|<kalvis@math.ucl.ac.uk>|

\end{verse}

An easy way to use the barcode fonts in \LaTeX{}:

\begin{verbatim}
\documentclass[a4paper]{article}

\pagestyle{empty}

\setlength{\oddsidemargin}{0pt}
\setlength{\textwidth}{\paperwidth}
\addtolength{\textwidth}{-2in}
\setlength{\marginparwidth}{0pt}

\setlength{\textheight}{\paperheight}
\addtolength{\textheight}{-2.5in}
\setlength{\topmargin}{0pt}

\font\eanfont=WLEAN scaled 2000
\def\ean#1{\vbox{\vskip20pt\eanfont#1\vskip20pt}}
\newcount\num
\def\a#1{\num=#1 \advance\num by `A \char\num}
\def\b#1{\num=#1 \advance\num by `a \char\num}
\def\c#1{\num=#1 \advance\num by `K \char\num}
\def\C#1#2#3#4#5#6{\c#1\c#2\c#3\c#4\c#5\c#6}

\def\A#1#2#3#4#5#6#7{\ifcase #7
{\a#1\a#2\a#3\a#4\a#5\a#6}%
\or {\a#1\a#2\b#3\a#4\b#5\b#6}%
\or {\a#1\a#2\b#3\b#4\a#5\b#6}%
\or {\a#1\a#2\b#3\b#4\b#5\a#6}%
\or {\a#1\b#2\a#3\a#4\b#5\b#6}%
\or {\a#1\b#2\b#3\a#4\a#5\b#6}%
\or {\a#1\b#2\b#3\b#4\a#5\a#6}%
\or {\a#1\b#2\a#3\b#4\a#5\b#6}%
\or {\a#1\b#2\a#3\b#4\b#5\a#6}%
\or {\a#1\b#2\b#3\a#4\b#5\a#6}%
\fi}

\newcount\cha
\newcount\chb
\makeatletter
\long\def\for{\@for}
\makeatother
\gdef\mysix#1#2#3#4#5#6{,#1#2,#3#4,#5#6}
\gdef\mywork#1#2{\advance\cha by #1 \advance\chb by #2}
\gdef\barch#1.#2.#3.{
\xdef\mylist{0#1\mysix#2\mysix#3}
\cha=0
\chb=0
\for \x:=\mylist\do{\expandafter\mywork\x}
\multiply\cha by 3
\advance\chb by \cha
\cha=\chb
\divide\cha by 10
\multiply\cha by -10
\advance\chb by \cha}
\def\bar#1.#2.#3.{\barch#1.#2.#3.
	\ifnum\chb>0 #1#2#3 has a bad check sum!\\[20pt]
	\else \ean{#1 +\A#2#1-\C#3+}\fi}
\begin{document}

 Examples

\bar3.034325.106199.

\bar4.074400.410000.

\bar5.449000.055521.

\bar5.010027.522336.

\bar8.410005.421052.

\bar9.780192.828941.

\end{document}
\end{verbatim}

\section{Installation}

Installation is described within the README file, in short.
Here I assume that you have a TDS compliant \TeX{} installation
already running.

Installation consists of several steps:

\begin{enumerate}
 \item unpack barcodes.dtx by running barcodes.ins through \TeX (I
guess you have already done that, lest you would not be able to read
this text), like {\tt tex barcodes.ins}
\item run {\tt vptovf} on all the vpl files, e.g. type something like 
 {\tt vptovf wlitf.vpl wlitf.vf wlitf.tfm}
\item if your \TeX\ system does not support automatic generation of 
{\tt tfm} files, run mf on all the .mf files.
\item move all the files to appropriate locations
\item install codean.pl for use with Perl
\item run the documentation through \LaTeX{}
\item clean up
\end{enumerate}

Items 1,2,4,6, and part of 7 can be automatically executed on ms-dos or
ms windows systems by running {\tt install.bat}. If you do not supply
any parameters, {\tt install} will install to {\tt C:\char92TeXMF}. If
you do supply a parameter, it should be the path to your TEXMF tree
(no trailing backslash, please). 

Here are the appropriate locations mentioned above -- all of them 
in the TEXMF tree:

\begin{tabular}{ll}
\em move & \em to\\
\tt *.mf & \tt fonts/source/public/misc\\
\tt *.tfm & \tt fonts/tfm/public/misc\\
\tt *.vf & \tt fonts/vf/public\\
\tt code39.tex &\tt tex/generic/misc\\
\tt barcodes.sty &\tt tex/latex/misc\\
\end{tabular}

Of course other locations might also work, but to me it seems fine 
this way.

Running plain \TeX{} on {\tt examples.tex} is the ultimate test: This
will only work when all the installation is well done.

The installation of Perl programs is beyond the scope of this
documentation. If you do not need code 128, you can go without
{\tt codean.pl}, especially if you use the macros described above.

\bibliography{bcfaq}

\end{document}
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% % general documentation ends here              %%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%</bcfaq>
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% % bibliography for general documentation       %%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%<*bcfaqbbl>
\begin{thebibliography}{Sau92}

\bibitem[Ol{\v{s}}94]{bc:ean}
Peter Ol{\v{s}}ak.
\newblock The ean barcodes by {\TeX}.
\newblock {\em TUGboat}, 15(4):459--464, 1994.

\bibitem[Sau92]{bc:sauter}
John Sauter.
\newblock Postnet codes using metafont.
\newblock {\em TUGboat}, 13(4):472--476, 1992.

\bibitem[Vul91]{bc:vulis}
Dimitri Vulis.
\newblock {\TeX} and envelopes.
\newblock {\em TUGboat}, 12(2):279--284, 1991.

\end{thebibliography}
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% % end of bibliography for general documentation %
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%</bcfaqbbl>
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% % example sheet starts here                     %
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%<*example>
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%
%% This file documents look and use of
%% the barcodes this package belongs to.
%% It may be freely used without any 
%% further permission.
%% You should have received this file as part of
%% the barcode package.
%%
%% Author: Peter Willadt
%% Date: 1997-11-29
%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%
%% Note:
%% 1. This file has already been run through codean.pl
%%
%% 2. You need to have the fonts installed, of course.
%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Fonts
%%
\font\xlix=wlc39 scaled 2000
\font\itf=wlitf  scaled 2000
\font\cdb=wlcdb  scaled 2000
\font\eanfont=WLEAN scaled 1200
\font\fntcxx=wlc128 scaled \magstep3
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Inputs
%%
\input code39.tex
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Def's
%%
%% for EAN
\def\ean#1{\message{Call codean.pl}}
\def\eean#1{\message{Call codean.pl}}
\def\isbn#1{\message{Call codean.pl}}
\def\embed#1{}
\def\EAN#1{\vbox{\hsize=0.4\hsize\vskip10pt\eanfont#1\vskip10pt}}
%% for Code 128
\def\CXXVIII{\bgroup\fntcxx\let\next\hexchar\next}
\def\hexchar#1#2{\if#1@\global\let\next\egroup\else\char"#1#2\fi\next}
%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Here we go
\parindent0pt
Hello, this is a test sheet of the barcode fonts.

At first, we deal with code 39. Code 39 is represented in this package
both in form of a native font (Metafont-source) and in form of
\TeX{}-macros. code 39 features low-density alphanumeric encoding.

Here you may see how HELLO looks like in code 39 (the start and stop
sign is mapped to @, if you're curious, so in the source to this sheet
I have written {\tt@HELLO@} after having selected the proper
font). This first example uses the font.

{\xlix@HELLO@}

Another approach is to use \TeX{} macros to make up bars. Here is the
same HELLO with macros:

\begincodethirtynine{HELLO}\endcodethirtynine

Interleaved two-of-five (ITF for short) features high-density
numerical-only encoding. Your code has to have an even number of
digits. The start sign is mapped to $+$, the end sign to $-$. 
So, to code 0123456789, you type {\tt+0123456789-}, and the result
looks like this:

{\itf+0123456789-}

If you still have not got enough of barcoding, here is codabar. Here
you got four sets of start/stop signs that get decoded together with
the numbers. The start/stop sign pairs are a/t, b/n, c/*, and d/e. So
{\tt a12345t} looks like this:\bigskip

{\cdb a12345t}

Now you should have a look at code 128. The bars itself look sometimes
disrupted; this is due to the fact that the widest elements are four
times as wide as the narrowest. Code 128 enables you to code any 7-bit
ascii character. With digits only, it is as efficent as itf. The bad
news is the preprocessing required, so you have to read the docs. The
following bars mean {\tt Hallo123456}\bigskip

\CXXVIII 6828414C4C4F630C2238506A@@  % Code128(Hallo123456)


And, last and perhaps most important, the EAN font. Read {\tt
eandoc.tex} to find out how these are coded, here is just the output
of the example code mentioned there:
\embed{2500000000000}

\line{
\EAN{4 +AcFHaa-KKLKNK+} % or, without checksum: %(4025700001030)
\hfil
\EAN{4 +AcFHaa-KKLKNK+} %(402570000103)
}
\line{
\EAN{2 +FAaaAa-KKLMNT+} % embedded(123)
\hfil
\EAN{9 +HiaCaB-LNOOSN+} % ISBN(0201134489)
}

And that's all. Perhaps you may think that this is not a beautiful
document---but barcodes aren't beautiful. As long as reading devices
do not have \ae{}sthetic feelings, I don't regard this as a problem.
\bye
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% % example sheet ends here                       %
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%</example>
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% % style file starts here                        %
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%<*bcsty>
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Options for using barcodes                             %%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% documented in bcfaq.tex                                %%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% itf stuff
%% general
\font\itf=wlitf scaled 1200
%% barcodes with depth
\def\bcbox#1{\lower3pt\hbox{\itf +#1-}}
%% barcodes made taller
\newbox\bsavebox
\newdimen\bcboxdepth
\bcboxdepth=4pt
\def\bdbox#1{\setbox\bsavebox\hbox{\itf +#1-}
\vbox{\hsize=\wd\bsavebox\offinterlineskip%
	\copy\bsavebox%
	\vskip-\ht\bsavebox\vskip\bcboxdepth%
	\box\bsavebox\vskip-\bcboxdepth}}
\def\bebox#1{\setbox\bsavebox\hbox{\itf +#1-}
\vbox{\hsize=\wd\bsavebox\offinterlineskip%
	\copy\bsavebox%
	\copy\bsavebox%
	\vskip-\ht\bsavebox\vskip\bcboxdepth%
	\box\bsavebox\vskip-\bcboxdepth}}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Code 128 stuff
\font\fntcxx=wlc128 scaled \magstep3
\def\CXXVIII{\bgroup\fntcxx\let\next\hexchar\next}
\def\cxxviii{\message{OOPS, use codean.pl}}
\def\hexchar#1#2{\if#1@
            \global\let\next\egroup
            \else\char"#1#2\fi\next}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Code 11 stuff
\font\codxifnt=wlc11 scaled\magstep2
%% relies on counters \cha and \chb defined below
\newif\ifcodexichecksumk
\codexichecksumkfalse
\makeatletter
\def\check@xichar{%
	\ifcodexichecksumk%
	{\count0=\cha\count1=\count0\divide\count1by11%
	 \multiply\count1by11\advance\count0by-\count1%
	 \ifnum10=\count0-\else\relax\the\count0\fi%
	 \global\advance\chb by\count0\global\advance\cha by\chb%
	}\fi
	\chb=\cha\divide\chb by11%
	\multiply\chb by11\advance\cha by-\chb%
	\ifnum10=\cha-\else\the\cha\fi%
}
\def\csumxi#1{%
	\if @#1%
		\let\next\check@xichar%
	\else	\if-#1\advance\chb by10%
			\else\advance\chb by#1%
		\fi%
		\advance\cha by\chb%
		#1%
	\fi%
	\next%
}
\makeatother
\def\codxi#1{{
	\codxifnt
	\cha=0\chb=0%
	@\let\next\csumxi\expandafter\expandafter\expandafter\csumxi#1@@
}}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% misc things
\font\codtnfnt=wlc39 scaled\magstep2
\def\codxxxix#1{{\codtnfnt @#1@}}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% EAN stuff
%% this code comes from Kalvis M. Jansons
%% eMail: <kalvis@math.ucl.ac.uk>
%%
\font\eanfont=WLEAN scaled 2000
\def\ean#1{\vbox{\vskip20pt\eanfont#1\vskip20pt}}
\newcount\num
\def\a#1{\num=#1 \advance\num by `A \char\num}
\def\b#1{\num=#1 \advance\num by `a \char\num}
\def\c#1{\num=#1 \advance\num by `K \char\num}
\def\C#1#2#3#4#5#6{\c#1\c#2\c#3\c#4\c#5\c#6}
\def\A#1#2#3#4#5#6#7{\ifcase #7
{\a#1\a#2\a#3\a#4\a#5\a#6}%
\or {\a#1\a#2\b#3\a#4\b#5\b#6}%
\or {\a#1\a#2\b#3\b#4\a#5\b#6}%
\or {\a#1\a#2\b#3\b#4\b#5\a#6}%
\or {\a#1\b#2\a#3\a#4\b#5\b#6}%
\or {\a#1\b#2\b#3\a#4\a#5\b#6}%
\or {\a#1\b#2\b#3\b#4\a#5\a#6}%
\or {\a#1\b#2\a#3\b#4\a#5\b#6}%
\or {\a#1\b#2\a#3\b#4\b#5\a#6}%
\or {\a#1\b#2\b#3\a#4\b#5\a#6}%
\fi}
\newcount\cha
\newcount\chb
\makeatletter
\long\def\for{\@for}
\makeatother
\gdef\mysix#1#2#3#4#5#6{,#1#2,#3#4,#5#6}
\gdef\mywork#1#2{\advance\cha by #1 \advance\chb by #2}
\gdef\barch#1.#2.#3.{
\xdef\mylist{0#1\mysix#2\mysix#3}
\cha=0
\chb=0
\for \x:=\mylist\do{\expandafter\mywork\x}
\multiply\cha by 3
\advance\chb by \cha
\cha=\chb
\divide\cha by 10
\multiply\cha by -10
\advance\chb by \cha}
\def\bar#1.#2.#3.{\barch#1.#2.#3.
	\ifnum\chb>0 #1#2#3 has a bad check sum!\\[20pt]
	\else \ean{#1 +\A#2#1-\C#3+}\fi}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% % style file ends here                          %
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%</bcsty>
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% % code 39 macro file starts here                %
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%<*code39mac>
%%% ====================================================================
%%%  @TeX-file{
%%%     author          = "Peter Willadt",
%%%     version         = "1",
%%%     date            = "16 August 1997",
%%%     time            = "10:00:00 GMT",
%%%     filename        = "code39.tex",
%%%     address         = "Peter Willadt
%%%                        Heinrich-Wieland-Allee 5
%%%                        75177 Pforzheim
%%%                        Germany",
%%%     email           = "Willadt@t-online.de",
%%%     codetable       = "ISO/ASCII",
%%%     keywords        = "Barcode, Code39, TeX",
%%%     abstract        = "This file contains macros to support the inclusion
%%%                        of code 39 barcode in TeX documents.",
%%%  }
%%% ====================================================================
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% This code supports barcodes in Code 39
%% Usage:
%%  For alphanumerical barcodes:
%%   \begincodethirtynine followed by 
%%   the stuff to code,
%%   ended with \endcodethirtynine
%%  For numerical only code:
%%   modify the code for pharamceuticals
%%  For german pharmaceutics:
%%   \pzncode1234562@ when 1234562 is the
%%   number to be coded as -1234562.
%%   this will also verify the checksum
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% This file may be freely used without any 
%% further permission.
%% It comes with absolutely no warranty.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% this is the common stuff
\newdimen\dick
\newdimen\duenn
\newdimen\duennbar
\newdimen\dickbar
\newdimen\antibleed
\dick=1mm
\duenn=0.5mm
\antibleed=0mm
\dickbar=\dick
\advance\dickbar by -\antibleed
\duennbar=\duenn
\advance\duennbar by -\antibleed
% b means bar
\def\b{\vrule width\duennbar}
\def\B{\vrule width\dickbar}
% s means space
\def\s{\hskip\duenn\hskip\antibleed}
\def\S{\hskip\dick\hskip\antibleed}
%%
 \def\tnzero{\b\s\b\S\B\s\B\s\b\s}
  \def\tnone{\B\s\b\S\b\s\b\s\B\s}
  \def\tntwo{\b\s\B\S\b\s\b\s\B\s}
\def\tnthree{\B\s\B\S\b\s\b\s\b\s}
 \def\tnfour{\b\s\b\S\B\s\b\s\B\s}
 \def\tnfive{\B\s\b\S\B\s\b\s\b\s}
  \def\tnsix{\b\s\B\S\B\s\b\s\b\s}
\def\tnseven{\b\s\b\S\b\s\B\s\B\s}
\def\tneight{\B\s\b\S\b\s\B\s\b\s}
 \def\tnnine{\b\s\B\S\b\s\B\s\b\s}
 \def\tninestart{\b\S\b\s\B\s\B\s\b\s}
 \def\tnineminus{\b\S\b\s\b\s\B\s\B\s}
  \def\tnineplus{\b\S\b\s\b\S\b\S\b\s}
\def\tninedollar{\b\S\b\S\b\S\b\s\b\s}
 \def\tnineslash{\b\S\b\S\b\s\b\S\b\s}
   \def\tninedot{\B\S\b\s\b\s\B\s\b\s}
\def\tninepercnt{\b\s\b\S\b\S\b\S\b\s}
 \def\tninespace{\b\S\B\s\b\s\B\s\b\s}
\def\tninelettera{\B\s\b\s\b\S\b\s\B\s}
\def\tnineletterb{\b\s\B\s\b\S\b\s\B\s}
\def\tnineletterc{\B\s\B\s\b\S\b\s\b\s}
\def\tnineletterd{\b\s\b\s\B\S\b\s\B\s}
\def\tninelettere{\B\s\b\s\B\S\b\s\b\s}
\def\tnineletterf{\b\s\B\s\B\S\b\s\b\s}
\def\tnineletterg{\b\s\b\s\b\S\B\s\B\s}
\def\tnineletterh{\B\s\b\s\b\S\B\s\b\s}
\def\tnineletteri{\b\s\B\s\b\S\B\s\b\s}
\def\tnineletterj{\b\s\b\s\B\S\B\s\b\s}
\def\tnineletterk{\B\s\b\s\b\s\b\S\B\s}
\def\tnineletterl{\b\s\B\s\b\s\b\S\B\s}
\def\tnineletterm{\B\s\B\s\b\s\b\S\b\s}
\def\tninelettern{\b\s\b\s\B\s\b\S\B\s}
\def\tninelettero{\B\s\b\s\B\s\b\S\b\s}
\def\tnineletterp{\b\s\B\s\B\s\b\S\b\s}
\def\tnineletterq{\b\s\b\s\b\s\B\S\B\s}
\def\tnineletterr{\B\s\b\s\b\s\B\S\b\s}
\def\tnineletters{\b\s\B\s\b\s\B\S\b\s}
\def\tninelettert{\b\s\b\s\B\s\B\S\b\s}
\def\tnineletteru{\B\S\b\s\b\s\b\s\B\s}
\def\tnineletterv{\b\S\B\s\b\s\b\s\B\s}
\def\tnineletterw{\B\S\B\s\b\s\b\s\b\s}
\def\tnineletterx{\b\S\b\s\B\s\b\s\B\s}
\def\tninelettery{\B\S\b\s\B\s\b\s\b\s}
\def\tnineletterz{\b\S\B\s\B\s\b\s\b\s}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% this is the code for 39 mode
\def\activatethemall{
	\catcode`\A=\active	\catcode`\B=\active
	\catcode`\C=\active	\catcode`\D=\active
	\catcode`\E=\active	\catcode`\F=\active
	\catcode`\G=\active	\catcode`\H=\active
	\catcode`\I=\active	\catcode`\J=\active
	\catcode`\K=\active	\catcode`\L=\active
	\catcode`\M=\active	\catcode`\N=\active
	\catcode`\O=\active	\catcode`\P=\active
	\catcode`\Q=\active	\catcode`\R=\active
	\catcode`\S=\active	\catcode`\T=\active
	\catcode`\U=\active	\catcode`\V=\active
	\catcode`\W=\active	\catcode`\X=\active
	\catcode`\Y=\active	\catcode`\Z=\active
	\catcode`+=\active	\catcode`-=\active
	\catcode`\ =\active	\catcode`.=\active
	\catcode`\$=\active	\catcode`\%=\active
	\catcode`\/=\active
	\catcode`\0=\active	\catcode`\1=\active
	\catcode`\2=\active	\catcode`\3=\active
	\catcode`\4=\active	\catcode`\5=\active
	\catcode`\6=\active	\catcode`\7=\active
	\catcode`\8=\active	\catcode`\9=\active
}
{\activatethemall
\gdef\begincodethirtynine{
	\bgroup\activatethemall\strut\tninestart
	\letA=\tninelettera	\letB=\tnineletterb
	\letC=\tnineletterc	\letD=\tnineletterd
	\letE=\tninelettere	\letF=\tnineletterf
	\letG=\tnineletterg	\letH=\tnineletterh
	\letI=\tnineletteri	\letJ=\tnineletterj
	\letK=\tnineletterk	\letL=\tnineletterl
	\letM=\tnineletterm	\letN=\tninelettern
	\letO=\tninelettero	\letP=\tnineletterp
	\letQ=\tnineletterq	\letR=\tnineletterr
	\letS=\tnineletters	\letT=\tninelettert
	\letU=\tnineletteru	\letV=\tnineletterv
	\letW=\tnineletterw	\letX=\tnineletterx
	\letY=\tninelettery	\letZ=\tnineletterz
	\let+=\tnineplus	\let-=\tnineminus
	\let =\tninespace	\let.=\tninedot
	\let$=\tninedollar	\let%=\tninepercnt
	\let/=\tnineslash
	\let0=\tnzero		\let1=\tnone
	\let2=\tntwo		\let3=\tnthree
	\let4=\tnfour		\let5=\tnfive
	\let6=\tnsix		\let7=\tnseven
	\let8=\tneight		\let9=\tnnine
}
}
\def\endcodethirtynine{
	\tninestart\egroup
}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% this code is used for german pharmaceutics
\newcount\ziffern
\newcount\checksum
\newcount\multreg
\def\tndigit#1{%
  \ifcase#1\tnzero\or\tnone%
    \or\tntwo\or\tnthree%
    \or\tnfour\or\tnfive%
    \or\tnsix\or\tnseven%
    \or\tneight\or\tnnine%
    \fi}
\def\endtncode{%
  \tninestart%
  \ifnum\ziffern=9
    \else\message{wrong digit count}
  \fi%
  \ifnum\checksum=0
    \else\message{wrong checksum}
  \fi%
  \egroup}
\def\nexttn#1{%
  \advance\ziffern by1
  \if@#1\let\next\endtncode
   \else
   \tndigit#1%
% begin checksum stuff
   \ifnum\ziffern=8
    \multreg=\checksum
    \divide\multreg by 11
    \multiply\multreg by 11
    \advance\checksum by-\multreg
    \multreg=#1
    \advance\checksum by-\multreg
    \ifnum\checksum=10
        \checksum=0
    \fi
   \else
    \multreg=#1
    \multiply\multreg by\ziffern
    \advance\checksum by\multreg
   \fi%
  \fi%
% end checksum stuff
  \next}
\def\pzncode{
  \bgroup
  \let\next\nexttn
  \ziffern=1\checksum=0\multreg=0
  \strut
  \tninestart\tnineminus%
  \next%
}
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% % code 39 macro file ends here                  %
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%</code39mac>
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% % MetaFont Code for Code 11 starts here         %
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%<*code11mf>
%% Code 11 in Metafont format
%% Peter Willadt 1998-04-10
%% For copyright and the like see the documentation
%% to the barcode package, from which this file is part of.
%% If you received only this file,
%% then maybe someone fooled you.
%% 
%% Code 11 requires one or two check digits.
%% These check digtis are calculated using a weighted mod 11-checksum.
%% You have to see the docs.
%% Start and stop chars are mapped to @,
%% codeable are 0--9 and the minus sign.

mode_setup;

bheight#:=5mm#;

% high res: .264 mm#
%  med res: .33  mm#
bwidth#   :=.33  mm#;

designsize         :=bheight#;
font_slant         :=0;
font_normal_space  :=8*bwidth#;
font_extra_space   :=0;
font_normal_stretch:=0;
font_normal_shrink :=0;
font_quad          :=15*bwidth#;

define_pixels(bheight, bwidth);

def CODExichar(expr charnum, spex) =
	numeric mywid, asval, i;
	mywid=6;
	for i= 0 upto 4:
		asval:=ASCII(substring(i,i+1) of spex);
		asval:=asval-ASCII("0");
		mywid:=mywid+asval;
	endfor;
	beginchar(charnum, mywid*bwidth#,bheight#,0);
		y1=y2=0;
		y3=y4=bheight;
	numeric myright,myleft,barweight,spcweight;
	myright:=0;myleft:=0;barweight:=0;spcweight:=0;
	for i=0 upto 4:
		asval:=ASCII(substring(i,i+1) of spex);
		asval:=asval-ASCII("0");
		myright:=myright+(asval+1)*bwidth;
		if not odd (i):
			% actual drawing
			x1:=myleft-blacker;
			x4:=x1;
			x2:=myright+blacker;
			x3:=x2;
			fill (z1)--(z2)--(z3)--(z4)--cycle;
		fi
		myleft:=myright;
	endfor;
	endchar;
enddef;

CODExichar("-","00100");
CODExichar("0","00001");
CODExichar("1","10001");
CODExichar("2","01001");
CODExichar("3","11000");
CODExichar("4","00101");
CODExichar("5","10100");
CODExichar("6","01100");
CODExichar("7","00011");
CODExichar("8","10010");
CODExichar("9","10000");
CODExichar("@","00110");

end;% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% % MetaFont Code for Code 11 ends here           %
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%</code11mf>
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% % MetaFont Code for Code 39 starts here         %
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%<*code39mf>
%% Code 39, in Metafont mode
%% Willadt 1997-08-17
mode_setup;

bheight#:=5mm#;

%% high res .2 mm,
%%  med res .3 mm,
%%   lo res .4 mm.

bwidth# :=.3mm#;

designsize         :=bheight#;
font_slant         :=0;
font_normal_space  :=13*bwidth#;
font_extra_space   :=0;
font_normal_stretch:=0;
font_normal_shrink :=0;
font_quad          :=13*bwidth#;

define_pixels(bheight, bwidth);

def thirtyninechar(expr charnum, spex) =
 beginchar(charnum, 13*bwidth#,bheight#,0);
  numeric myright,myleft;
  numeric asval, i;
  myright:=0;myleft:=0;
  y1=y2=0;y3=y4=bheight;
  for i=0 upto 11:
    asval:=ASCII(substring(i,i+1) of spex);
    exitif asval=-1;
    asval:=asval-ASCII("0");
    myright:=myright+asval*bwidth;
    if not odd (i):
	% actual drawing
	x1:=myleft-blacker;
	x4:=x1;
	x2:=myright+blacker;
	x3:=x2;
	fill (z1)--(z2)--(z3)--(z4)--cycle;
    fi
    myleft:=myright;
  endfor;
 endchar;
enddef;

\thirtyninechar("0")("1112212111");
\thirtyninechar("1")("2112111121");
\thirtyninechar("2")("1122111121");
\thirtyninechar("3")("2122111111");
\thirtyninechar("4")("1112211121");
\thirtyninechar("5")("2112211111");
\thirtyninechar("6")("1122211111");
\thirtyninechar("7")("1112112121");
\thirtyninechar("8")("2112112111");
\thirtyninechar("9")("1122112111");
\thirtyninechar( 64)("1211212111"); % start = @
\thirtyninechar("-")("1211112121");
\thirtyninechar("+")("1211121211");
\thirtyninechar("$")("1212121111");
\thirtyninechar("/")("1212111211");
\thirtyninechar(".")("2211112111");
\thirtyninechar( 37)("1112121211"); % percent
\thirtyninechar( 32)("1221112111"); % space
\thirtyninechar("A")("2111121121");
\thirtyninechar("B")("1121121121");
\thirtyninechar("C")("2121121111");
\thirtyninechar("D")("1111221121");
\thirtyninechar("E")("2111221111");
\thirtyninechar("F")("1121221111");
\thirtyninechar("G")("1111122121");
\thirtyninechar("H")("2111122111");
\thirtyninechar("I")("1121122111");
\thirtyninechar("J")("1111222111");
\thirtyninechar("K")("2111111221");
\thirtyninechar("L")("1121111221");
\thirtyninechar("M")("2121111211");
\thirtyninechar("N")("1111211221");
\thirtyninechar("O")("2111211211");
\thirtyninechar("P")("1121211211");
\thirtyninechar("Q")("1111112221");
\thirtyninechar("R")("2111112211");
\thirtyninechar("S")("1121112211");
\thirtyninechar("T")("1111212211");
\thirtyninechar("U")("2211111121");
\thirtyninechar("V")("1221111121");
\thirtyninechar("W")("2221111111");
\thirtyninechar("X")("1211211121");
\thirtyninechar("Y")("2211211111");
\thirtyninechar("Z")("1221211111");

\end;

% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% % MetaFont Code for Code 39 ends here           %
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%</code39mf>
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% % MetaFont Code for Code 128 starts here        %
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%<*code128mf>
%% Code 128, in Metafont mode
%% This gives a raw font, that should be mapped properly
%% so read the docs!
%% Willadt 1997-08-17 

mode_setup;

bheight#:=5mm#;

%% high res: .264 mm#
%%  med res: .33  mm#
bwidth#   :=.33  mm#;

designsize         :=bheight#;
font_slant         :=0;
font_normal_space  :=11*bwidth#;
font_extra_space   :=0;
font_normal_stretch:=0;
font_normal_shrink :=0;
font_quad          :=11*bwidth#;

define_pixels(bheight, bwidth);

def CXXVIIIchar(expr charnum, spex) =
	numeric mywid, asval, i;
	mywid=0;
%	for i = 0 upto 8:
%		asval:=ASCII(substring(i,i+1) of spex);
%		exitif asval=-1;
%		asval:=asval-ASCII("0");
%		mywid:=mywid+asval;
%	endfor
%	beginchar(charnum, mywid*bwidth#,bheight#,0);
	beginchar(charnum, 11*bwidth#,bheight#,0);
		y1=y2=0;
		y3=y4=bheight;
	numeric myright,myleft,barweight,spcweight;
	myright:=0;myleft:=0;barweight:=0;spcweight:=0;
	for i=0 upto 8:
		asval:=ASCII(substring(i,i+1) of spex);
		exitif asval=-1;
		asval:=asval-ASCII("0");
		myright:=myright+asval*bwidth;
		if not odd (i):
% check for typos
%			barweight:=barweight+asval;
			% actual drawing
			x1:=myleft-blacker;
			x4:=x1;
			x2:=myright+blacker;
			x3:=x2;
			fill (z1)--(z2)--(z3)--(z4)--cycle;
% check for typos
%		else:
%		 	spcweight:=spcweight+asval;
		fi
		myleft:=myright;
	endfor;
% 	check for typos
%	if not odd(spcweight):	message "error in spc cnt";
%	fi
%	if odd(barweight): 	message "error in bar cnt";
%	fi
	endchar;
enddef;

CXXVIIIchar(107,"212222"); % Ersatz fuer Null
CXXVIIIchar(  0,"212222");
CXXVIIIchar(  1,"222122");
CXXVIIIchar(  2,"222221");
CXXVIIIchar(  3,"121223");
CXXVIIIchar(  4,"121322");
CXXVIIIchar(  5,"131222");
CXXVIIIchar(  6,"122213");
CXXVIIIchar(  7,"122312");
CXXVIIIchar(  8,"132212");
CXXVIIIchar(  9,"221213");
CXXVIIIchar( 10,"221312");
CXXVIIIchar( 11,"231212");
CXXVIIIchar( 12,"112232");
CXXVIIIchar( 13,"122132");
CXXVIIIchar( 14,"122231");
CXXVIIIchar( 15,"113222");
CXXVIIIchar( 16,"123122");
CXXVIIIchar( 17,"123221");
CXXVIIIchar( 18,"223211");
CXXVIIIchar( 19,"221132");
CXXVIIIchar( 20,"221231");
CXXVIIIchar( 21,"213212");
CXXVIIIchar( 22,"223112");
CXXVIIIchar( 23,"312131");
CXXVIIIchar( 24,"311222");
CXXVIIIchar( 25,"321122");
CXXVIIIchar( 26,"321221");
CXXVIIIchar( 27,"312212");
CXXVIIIchar( 28,"322112");
CXXVIIIchar( 29,"322211");
CXXVIIIchar( 30,"212123");
CXXVIIIchar( 31,"212321");
CXXVIIIchar( 32,"232121");
CXXVIIIchar( 33,"111323");
CXXVIIIchar( 34,"131123");
CXXVIIIchar( 35,"131321");
CXXVIIIchar( 36,"112313");
CXXVIIIchar( 37,"132113");
CXXVIIIchar( 38,"132311");
CXXVIIIchar( 39,"211313");
CXXVIIIchar( 40,"231113");
CXXVIIIchar( 41,"231311");
CXXVIIIchar( 42,"112133");
CXXVIIIchar( 43,"112331");
CXXVIIIchar( 44,"132131");
CXXVIIIchar( 45,"113123");
CXXVIIIchar( 46,"113321");
CXXVIIIchar( 47,"133121");
CXXVIIIchar( 48,"313121");
CXXVIIIchar( 49,"211331");
CXXVIIIchar( 50,"231131");
CXXVIIIchar( 51,"213113");
CXXVIIIchar( 52,"213311");
CXXVIIIchar( 53,"213131");
CXXVIIIchar( 54,"311123");
CXXVIIIchar( 55,"311321");
CXXVIIIchar( 56,"331121");
CXXVIIIchar( 57,"312113");
CXXVIIIchar( 58,"312311");
CXXVIIIchar( 59,"332111");
CXXVIIIchar( 60,"314111");
CXXVIIIchar( 61,"221411");
CXXVIIIchar( 62,"431111");
CXXVIIIchar( 63,"111224");
CXXVIIIchar( 64,"111422");
CXXVIIIchar( 65,"121124");
CXXVIIIchar( 66,"121421");
CXXVIIIchar( 67,"141122");
CXXVIIIchar( 68,"141221");
CXXVIIIchar( 69,"112214");
CXXVIIIchar( 70,"112412");
CXXVIIIchar( 71,"122114");
CXXVIIIchar( 72,"122411");
CXXVIIIchar( 73,"142112");
CXXVIIIchar( 74,"142211");
CXXVIIIchar( 75,"241211");
CXXVIIIchar( 76,"221114");
CXXVIIIchar( 77,"413111");
CXXVIIIchar( 78,"241112");
CXXVIIIchar( 79,"134111");
CXXVIIIchar( 80,"111242");
CXXVIIIchar( 81,"121142");
CXXVIIIchar( 82,"121241");
CXXVIIIchar( 83,"114212");
CXXVIIIchar( 84,"124112");
CXXVIIIchar( 85,"124211");
CXXVIIIchar( 86,"411212");
CXXVIIIchar( 87,"421112");
CXXVIIIchar( 88,"421211");
CXXVIIIchar( 89,"212141");
CXXVIIIchar( 90,"214121");
CXXVIIIchar( 91,"412121");
CXXVIIIchar( 92,"111143");
CXXVIIIchar( 93,"111341");
CXXVIIIchar( 94,"131141");
CXXVIIIchar( 95,"114113");
CXXVIIIchar( 96,"114311");
CXXVIIIchar( 97,"411113");
CXXVIIIchar( 98,"411311");
CXXVIIIchar( 99,"113141");
CXXVIIIchar(100,"114131");
CXXVIIIchar(101,"311141");
CXXVIIIchar(102,"411131");
CXXVIIIchar(103,"211412");
CXXVIIIchar(104,"211214");
CXXVIIIchar(105,"211232");
CXXVIIIchar(106,"2331112");

end;
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% % MetaFont Code for Code 128 ends here          %
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%</code128mf>
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% % MetaFont Code for EAN starts here             %
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%<*codeeanmf>
%% Font for printing EAN Code
%% For small sizes (on the Deskjet, < 1,0) you have to be
%% very careful and test if the font is still machine readable.
%% On write-black-printers, it may be necessary to reduce
%% the width of black bars by fiddling with
%% the definition of fb().
%% For producing EAN Add-ons or codes with variable height,
%% it would be a good idea to shorten the height of the bars and
%% to leave the numbers out of the bars-definition, so that you
%% could stack several bars above each other.
%% Flexibility would increase, but---on the other hand---
%% TeX macros for setting EAN code would become even more complicated.
%
%% Peter Willadt 1997, September, 21
%
% For more information about EAN-Codes, you may consult the Centrale
% f\"ur Coorganisation in K\"oln, Germany, or one of the associated 
% organisations in your country. The complete EAN-Handbook costs 
% about a hundred german marks.
%
% Just some information:
% EAN-Digits consist of seven elements that are either black or white.
% Each element has the same width.
% Fonts A, B, and C are differently coded.
% The first half of the EAN-number is coded in fonts A and B, the second
% half is coded in font C. The first digit of the EAN-number is not
% directly coded but will be taken from the alternate uses of characters
% from font A and font B for the first half.
% This strange coding is a direct consequence of
% the ancestry of the EAN-code---it is derived from the american UPC-code
% (12 digits)---and there had to be a way of compatibly expanding the UPC.
%
% The first two digits of the EAN-number code the country of origin of
% the product, the next five digits (mostly) code the manufacturer, the
% remaining digits (with the exception of the last) code the product.
% The last digit of the EAN-number is a checksum.
% For In-House-Use, you may use EAN starting with 20 to 29.
%
% EAN numbers do not contain any qualifiers. From a number, you cannot say
% which kind of product is coded, unless you contact the manufacturer.
%
% Eight digit EAN numbers consist of four digits from font A and four digits
% from font C. 
%
% UPC is EAN with the first digit equal to zero.
%
% Here is a table that shows which code to use for the digits 2 to 7 
% depending on the first digit.
% The number on the right shows the first digit.
% A zero in the array means to choose font A, a one means to choose font B.
% 
% static UBYTE abtab[10][6]={
%	{0,0,0,0,0,0},	/* 0 */
%	{0,0,1,0,1,1},	/* 1 */
%	{0,0,1,1,0,1},  /* 2 */
%	{0,0,1,1,1,0},  /* 3 */
%	{0,1,0,0,1,1},	/* 4 */
%	{0,1,1,0,0,1},  /* 5 */
%	{0,1,1,1,0,0},  /* 6 */
%	{0,1,0,1,0,1},  /* 7 */
%	{0,1,0,1,1,0},  /* 8 */
%	{0,1,1,0,1,0}   /* 9 */
% };
% This font is coded in a way that requires extensive preprocessing.
% 0 to 9 yield the digits from 0 to 9
% A to J yield the codes from charset A
% a to j yield the codes from charset B
% K to T yield the codes from charset C
% + makes the start and stop sign and - the middle sign
% So, to code the number 2099993098253, you have to write
% {\eanfont2 +AJjjJd-KTSMPN+}. Please note that the last
% digit is a checksum.
% This font is free to be used without any further permission;
% it comes with no warranty. I strongly recommend to test
% the readability of barcodes before going into mass production.
%
% There should be a Perl routine delivered together with this font
% that takes a TeX file and replaces EAN numbers by their encoded 
% equivalent. There also should be a file called EANDOC.TEX
% that tells you more about that.
% 
%% Author
%% Peter Willadt
%% Heinrich-Wieland-Allee 5
%% 75177 Pforzheim
%% Germany
%% email: Willadt@t-online.de
%

mode_setup;

%% EAN size 1 (100%)
%
bheight#:=22.85mm#;
bdepth#:=1.65mm#;
bwidth#:=0.33mm#;
digheight#:=2.75mm#;
numgap#=1mm#;
digdiam#=0.9pt#;
lgap#:= bwidth#+0.5 digdiam#;
totheight#=bheight#+digheight#+numgap#;
ndheight#:=totheight#-bheight#-bdepth#;
define_pixels(ndheight,digheight,numgap,lgap,bwidth);
define_blacker_pixels(bheight,totheight,digdiam);

font_normal_space=7*bwidth#;
font_size 10pt#;

def fb(expr posn) =
	x20:=(posn-1)*bwidth;
	x21:=x20;
	x22:=posn*bwidth;
	x23:=x22;
	y20:=y22:=digheight+numgap;
	y21:=y23:=h;
	fill z20--z21--z23--z22--cycle;
enddef;

def klotz(expr posn) =
	x1:=(posn-1)*bwidth;x2:=posn*bwidth;
	x3:=x2;x4:=x1;
	y1:=y2:=ndheight;
	y3:=y4:=digheight+numgap;
	fill z1--z2--z3--z4--cycle;
enddef;

def nuller =
	x1=0.5w;
	y1=digheight;
	x2=lgap;
	y2=0.8y1;
	x3=x2;
	y3-y4=y1-y2;
	y4=0;
	x4=x1;
	x5=w-x3;
	y5=y3;
	x6=x5;
	y6=y2;
	pickup pencircle scaled digdiam;
	draw z1..{down}z2--z3{down}..z4..{up}z5--z6{up}..cycle;
enddef;

def einser =
	x1=x2=0.5w+lgap;
	x3=2*lgap;
	y1=0;
	y2=digheight;
	y3=0.8digheight;
	pickup pencircle scaled digdiam;
	draw z1--z2--z3;
enddef;

def zweier = 
	x1=w-lgap;
	x2=lgap;
	y1=y2=0;
	x3=x2;
	y3=0.15 digheight;
	x4=w-lgap;
	y4=0.6 digheight;
	x5=x4;
	y5=0.9 digheight;
	x6=0.5w;
	y6=digheight;
	x7=x2;
	y7=y5;
	pickup pencircle scaled digdiam;
	draw z1--z2{up}..z3..z4..z5..z6..z7;
enddef;

def dreier = 
	x1=lgap;
	w-x2=x1;
	y1=y2=digheight;
	x3=0.5w;
	y3=0.6digheight;
	y4=0.5y3;
	x4=x2;
%	y5=0.5digdiam;
	y5=0;
	x5=0.5w;
	x6=x1;
	y6=0.2 digheight;
	pickup pencircle scaled digdiam;
	draw z1--z2--z3{right}..z4..z5..z6;
enddef;

def vierer =
	x1=0.6w;y1=digheight;
	x2=lgap;
	y2=0.3digheight;
	y3=y2;
	w-x3=x2;
%	w-x4=x4-x1;
	x4=0.5[x1,x3];
	x5=x4;
	y4=0.5digheight;
	y5=0;
	pickup pencircle scaled digdiam;
	draw z1--z2--z3;
	draw z4--z5;
enddef;

def fuenfer =
	x2=lgap;
	x2=w-x1;
	y1=y2=digheight;
	x3=x2;
	y3=0.7digheight;
	x4=x1;
	y3-y4=y4;
	x5=x2;
	y5=0;
	pickup pencircle scaled digdiam;
	draw z1--z2--z3{right}..z4..{left}z5;
enddef;

def sechser =
	x1=0.6w;
	y1=digheight;
	x2=lgap;
	x4=w-x2;
%	y2=y4=0.3digheight;
	y2=y4=0.5y5;
	x3=x5=0.5w;
	y3=0;
%	y5=0.6 digheight;
	y5=x4-x2;
	pickup pencircle scaled digdiam;
	draw z2..z3..z4..z5..cycle;
	draw z1..{down}z2;
enddef;
def siebener =
	x1=lgap;
	x2=w-x1;
	y1=y2=digheight;
	x3=x4=0.5w;
	y3=0.3digheight;
	y4=0;
	pickup pencircle scaled digdiam;
	draw z1--z2;
	draw z2..z3...z4;
enddef;
def achter =
	x1=x3=x5=0.5w;
	y1=digheight;
	y3=0.6digheight;
	y5=0;
	x2=w-x7;
	x4=w-x6;
	y2=y7=0.5[y1,y3];
	y4=y6=0.5[y3,y5];
	x2=1.5lgap;
	x4=w-lgap;
	pickup pencircle scaled digdiam;
	draw z1..z2..z3..z7..cycle;
	draw z3..z4..z5..z6..cycle;
enddef;
def neuner =
	x1=0.4w;
	y1=0;
	x2=w-lgap;
	x4=w-x2;
%	y2=y4=0.7digheight;
	y2=y4=0.5[y5,y3];
	x3=x5=0.5w;
	y3=digheight;
	y5=0.4 digheight;
	pickup pencircle scaled digdiam;
	draw z1..{up}z2;
	draw z2..z3..z4..z5..cycle;
enddef;
beginchar("+",3*bwidth#,totheight#,0); "Das Randzeichen";
	fb(1); fb(3);
	klotz(1);
	klotz(3);
endchar;
beginchar("-",5*bwidth#,totheight#,0); "Das Mittenzeichen";
	fb(2); fb(4);
	klotz(2);
	klotz(4);
endchar;

beginchar("0",7*bwidth#,digheight#,0);
	nuller;
endchar;

beginchar("1",7*bwidth#,digheight#,0);
	einser;
endchar;

beginchar("2",7*bwidth#,digheight#,0);
	zweier;
endchar;

beginchar("3",7*bwidth#,digheight#,0);
	dreier;
endchar;

beginchar("4",7*bwidth#,digheight#,0);
	vierer;
endchar;

beginchar("5",7*bwidth#,digheight#,0);
	fuenfer;
endchar;

beginchar("6",7*bwidth#,digheight#,0);
	sechser;
endchar;

beginchar("7",7*bwidth#,digheight#,0);
	siebener;
endchar;

beginchar("8",7*bwidth#,digheight#,0);
	achter;
endchar;

beginchar("9",7*bwidth#,digheight#,0);
	neuner;
endchar;

% Zeichensatz A

beginchar("A",7*bwidth#,totheight#,0); "Die Null (A)";
	fb(4);fb(5);fb(7);
	nuller;
endchar;

beginchar("B",7*bwidth#,totheight#,0); "Die Eins (A)";
	fb(3);fb(4);fb(7);
	einser;
endchar;

beginchar("C",7*bwidth#,totheight#,0); "Die Zwei (A)";
	fb(3);fb(6);fb(7);
	zweier;
endchar;
beginchar("D",7*bwidth#,totheight#,0); "Die Drei (A)";
	fb(2);fb(3);fb(4);fb(5);fb(7);
	dreier;
endchar;
beginchar("E",7*bwidth#,totheight#,0); "Die Vier (A)";
	fb(2);fb(6);fb(7);
	vierer;
endchar;
beginchar("F",7*bwidth#,totheight#,0); "Die Fuenf (A)";
	fb(2);fb(3);fb(7);
	fuenfer;
endchar;	
beginchar("G",7*bwidth#,totheight#,0); "Die Sechs (A)";
	fb(2);fb(4);fb(5);fb(6);fb(7);
	sechser;
endchar;
beginchar("H",7*bwidth#,totheight#,0); "Die Sieben (A)";
	fb(2);fb(3);fb(4);fb(6);fb(7);
	siebener;
endchar;

beginchar("I",7*bwidth#,totheight#,0); "Die Acht (A)";
	fb(2);fb(3);fb(5);fb(6);fb(7);
	achter;
endchar;

beginchar("J",7*bwidth#,totheight#,0); "Die Neun (A)";
	fb(4);fb(6);fb(7);
	neuner;
endchar;	

% Zeichensatz B

beginchar("a",7*bwidth#,totheight#,0); "Die Null (B)";
	fb(2);fb(5);fb(6);fb(7);
	nuller;
endchar;

beginchar("b",7*bwidth#,totheight#,0); "Die Eins (B)";
	fb(2);fb(3);fb(6);fb(7);
	einser;
endchar;

beginchar("c",7*bwidth#,totheight#,0); "Die Zwei (B)";
	fb(3);fb(4);fb(6);fb(7);
	zweier;
endchar;
beginchar("d",7*bwidth#,totheight#,0); "Die Drei (B)";
	fb(2);fb(7);
	dreier;
endchar;
beginchar("e",7*bwidth#,totheight#,0); "Die Vier (B)";
	fb(3);fb(4);fb(5);fb(7);
	vierer;
endchar;
beginchar("f",7*bwidth#,totheight#,0); "Die Fuenf (B)";
	fb(2);fb(3);fb(4);fb(7);
	fuenfer;
endchar;	
beginchar("g",7*bwidth#,totheight#,0); "Die Sechs (B)";
	fb(5);fb(7);
	sechser;
endchar;
beginchar("h",7*bwidth#,totheight#,0); "Die Sieben (B)";
	fb(3);fb(7);
	siebener;
endchar;

beginchar("i",7*bwidth#,totheight#,0); "Die Acht (B)";
	fb(4);fb(7);
	achter;
endchar;

beginchar("j",7*bwidth#,totheight#,0); "Die Neun (B)";
	fb(3);fb(5);fb(6);fb(7);
	neuner;
endchar;

% Zeichensatz C

beginchar("K",7*bwidth#,totheight#,0); "Die Null (C)";
	fb(1);fb(2);fb(3);fb(6);
	nuller;
endchar;

beginchar("L",7*bwidth#,totheight#,0); "Die Eins (C)";
	fb(1);fb(2);fb(5);fb(6);
	einser;
endchar;

beginchar("M",7*bwidth#,totheight#,0); "Die Zwei (C)";
	fb(1);fb(2);fb(4);fb(5);
	zweier;
endchar;
beginchar("N",7*bwidth#,totheight#,0); "Die Drei (C)";
	fb(1);fb(6);
	dreier;
endchar;
beginchar("O",7*bwidth#,totheight#,0); "Die Vier (C)";
	fb(1);fb(3);fb(4);fb(5);
	vierer;
endchar;
beginchar("P",7*bwidth#,totheight#,0); "Die Fuenf (C)";
	fb(1);fb(4);fb(5);fb(6);
	fuenfer;
endchar;	
beginchar("Q",7*bwidth#,totheight#,0); "Die Sechs (C)";
	fb(1);fb(3);
	sechser;
endchar;
beginchar("R",7*bwidth#,totheight#,0); "Die Sieben (C)";
	fb(1);fb(5);
	siebener;
endchar;

beginchar("S",7*bwidth#,totheight#,0); "Die Acht (C)";
	fb(1);fb(4);
	achter;
endchar;

beginchar("T",7*bwidth#,totheight#,0); "Die Neun (C)";
	fb(1);fb(2);fb(3);fb(5);
	neuner;
endchar;

end;
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% % MetaFont Code for EAN ends here               %
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%</codeeanmf>
%<*wlcr39mf>
% Code 39, in Metafont mode
% $90^0$ rotated to the right, 
% make Barcodes run down instead of across.
% Willadt 1998-04-28
mode_setup;

bwidth#:=5mm#;

% high res .2 mm,
%  med res .3 mm,
%   lo res .4 mm.

bheight# :=.3mm#;

designsize         :=13*bheight#;
font_slant         :=0;
font_normal_space  :=bwidth#;
font_extra_space   :=0;
font_normal_stretch:=0;
font_normal_shrink :=0;
font_quad          :=bwidth#;

define_pixels(bheight, bwidth);

def thirtyninechar(expr charnum, spex) =
 beginchar(charnum, bwidth#,12*bheight#,bheight#);
  numeric mytop,mybot;
  numeric asval, i;
  mytop:=12*bheight;mybot:=mytop;
  x1=x2=0;x3=x4=bwidth;
  for i=0 upto 11:
    asval:=ASCII(substring(i,i+1) of spex);
    exitif asval=-1;
    asval:=asval-ASCII("0");
    mybot:=mybot-asval*bheight;
    if not odd (i):
	% actual drawing
	y1:=mytop+blacker;
	y4:=y1;
	y2:=mybot-blacker;
	y3:=y2;
	fill (z1)--(z2)--(z3)--(z4)--cycle;
    fi
    mytop:=mybot;
  endfor;
 endchar;
enddef;

\thirtyninechar("0")("1112212111");
\thirtyninechar("1")("2112111121");
\thirtyninechar("2")("1122111121");
\thirtyninechar("3")("2122111111");
\thirtyninechar("4")("1112211121");
\thirtyninechar("5")("2112211111");
\thirtyninechar("6")("1122211111");
\thirtyninechar("7")("1112112121");
\thirtyninechar("8")("2112112111");
\thirtyninechar("9")("1122112111");
\thirtyninechar( 64)("1211212111"); % start = @
\thirtyninechar("-")("1211112121");
\thirtyninechar("+")("1211121211");
\thirtyninechar("$")("1212121111");
\thirtyninechar("/")("1212111211");
\thirtyninechar(".")("2211112111");
\thirtyninechar( 37)("1112121211"); % percent
\thirtyninechar( 32)("1221112111"); % space
\thirtyninechar("A")("2111121121");
\thirtyninechar("B")("1121121121");
\thirtyninechar("C")("2121121111");
\thirtyninechar("D")("1111221121");
\thirtyninechar("E")("2111221111");
\thirtyninechar("F")("1121221111");
\thirtyninechar("G")("1111122121");
\thirtyninechar("H")("2111122111");
\thirtyninechar("I")("1121122111");
\thirtyninechar("J")("1111222111");
\thirtyninechar("K")("2111111221");
\thirtyninechar("L")("1121111221");
\thirtyninechar("M")("2121111211");
\thirtyninechar("N")("1111211221");
\thirtyninechar("O")("2111211211");
\thirtyninechar("P")("1121211211");
\thirtyninechar("Q")("1111112221");
\thirtyninechar("R")("2111112211");
\thirtyninechar("S")("1121112211");
\thirtyninechar("T")("1111212211");
\thirtyninechar("U")("2211111121");
\thirtyninechar("V")("1221111121");
\thirtyninechar("W")("2221111111");
\thirtyninechar("X")("1211211121");
\thirtyninechar("Y")("2211211111");
\thirtyninechar("Z")("1221211111");

\end;
%</wlcr39mf>
%<*code93mf>
% not complete, yet
%% Code 93 in Metafont format
%% Peter Willadt 1998-04-21
%% For copyright and the like see the documentation
%% to the barcode package, from which this file is part of.
%% If you received only this file,
%% then maybe someone fooled you.
%% 
%% Code 93 requires one or two check digits.
%% These check digtis are calculated using a weighted mod 11-checksum.
%% You have to see the docs.
%% Start and stop chars are mapped to < and >, respectively.
%% codeable are 0--9 , A-Z, -,+, space, dot, $, /, and percent.
%% To print full ascii, ordinary characters have to be preceeded with
%% on of four shift characters. Thes shift characters are
%% ($) mapped to =
%% (%) mapped to [
%% (/) mapped to |
%% (+) mapped to ]

mode_setup;

bheight#:=5mm#;

% high res: .264 mm#
%  med res: .33  mm#
bwidth#   :=.33  mm#;

designsize         :=bheight#;
font_slant         :=0;
font_normal_space  :=9*bwidth#;
font_extra_space   :=0;
font_normal_stretch:=0;
font_normal_shrink :=0;
font_quad          :=10*bwidth#;

define_pixels(bheight, bwidth);

def CODExciiichar(expr charnum, spex) =
	numeric mywid, asval, i;
	mywid=0;
	for i= 0 upto 5:
		asval:=ASCII(substring(i,i+1) of spex);
		asval:=asval-ASCII("0");
		mywid:=mywid+asval;
	endfor;
	beginchar(charnum, mywid*bwidth#,bheight#,0);
		y1=y2=0;
		y3=y4=bheight;
	numeric myright,myleft,barweight,spcweight;
	myright:=0;myleft:=0;barweight:=0;spcweight:=0;
	for i=0 upto 5:
		asval:=ASCII(substring(i,i+1) of spex);
		asval:=asval-ASCII("0");
		myright:=myright+asval*bwidth;
		if not odd (i):
			% actual drawing
			x1:=myleft-blacker;
			x4:=x1;
			x2:=myright+blacker;
			x3:=x2;
			fill (z1)--(z2)--(z3)--(z4)--cycle;
		fi
		myleft:=myright;
	endfor;
	endchar;
enddef;

CODExciiichar("0","131112");
CODExciiichar("1","111213");
CODExciiichar("2","111312");
CODExciiichar("3","111411");
CODExciiichar("4","121113");
CODExciiichar("5","121212");
CODExciiichar("6","121311");
CODExciiichar("7","111114");
CODExciiichar("8","131211");
CODExciiichar("9","141111");
CODExciiichar("A","211113");
CODExciiichar("B","211212");
CODExciiichar("C","211311");
CODExciiichar("D","221112");
CODExciiichar("E","221211");
CODExciiichar("F","231111");
CODExciiichar("G","112113");
CODExciiichar("H","112212");
CODExciiichar("I","112311");
CODExciiichar("J","122112");
CODExciiichar("K","132111");
CODExciiichar("L","111123");
CODExciiichar("M","111222");
CODExciiichar("N","111321");
CODExciiichar("O","121122");
CODExciiichar("P","131121");
CODExciiichar("Q","212112");
CODExciiichar("R","212211");
CODExciiichar("S","211122");
CODExciiichar("T","211221");
CODExciiichar("U","221121");
CODExciiichar("V","222111");
CODExciiichar("W","112122");
CODExciiichar("X","112221");
CODExciiichar("Y","122121");
CODExciiichar("Z","123111");
CODExciiichar("-","121131");
CODExciiichar(".","311112");
CODExciiichar( 32,"311211");% space
CODExciiichar( 36,"321111");% dollar
CODExciiichar("/","112131");
CODExciiichar("+","113121");
CODExciiichar( 37,"211131");% percent
% % the four escape characters 
CODExciiichar("(","121221");% ought to be ($)
CODExciiichar(")","312111");% ought to be (%)
CODExciiichar("[","311121");% ought to be (/)
CODExciiichar("]","122211");% ought to be (+)
CODExciiichar("<","111141");% start sign
CODExciiichar(">","1111411");% stop sign has extra bar

end;
%</code93mf>
